Headphone stand



FIG. 1 is a front, left and top perspective view of a headphone stand, showing my new design;

FIG. 2 is a rear, right and bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a perspective view in use thereof.

The broken lines shown in the drawings illustrate portions of the headphone stand that form no part of the claimed design. 

CLAIM The ornamental design for a headphone stand, as shown and described. 